Staff Security Engineer, Application Security at NinjaTrader – Chicago or Remote* | Jobyssey

You'll help scale and mature the security program by owning key security domains and initiatives end-to-end, working closely with engineering to ensure systems are secure by design. This role is highly hands-on, with opportunities to drive meaningful impact through automation, secure design, and developer enablement. You'll operate with significant autonomy while partnering with senior engineers and security leadership to scale security across the organization.

Responsibilities

Own key security domains such as vulnerability management, application security, API security, and supply chain security
Drive improvements in security coverage, prioritization, and remediation workflows
Partner with engineering teams to integrate security into design reviews, threat modeling, CI/CD pipelines, and developer workflows
Provide actionable, pragmatic guidance that helps teams ship securely
Develop and improve security tooling and automation to reduce manual effort
Implement and tune tools for SAST, SCA, DAST, dependency security, and container security
Leverage AI/LLMs where appropriate to improve triage, detection, and review processes
Triage and prioritize vulnerabilities using risk-based approaches
Partner with teams to ensure timely remediation of critical issues
Help define and improve SLAs, metrics, and reporting
Conduct threat modeling, design reviews, and security assessments
Contribute to incident response and postmortems for security events
Identify and help remediate systemic risks

Requirements

7+ years of experience in Application Security, Product Security, or Security Engineering
Strong hands-on experience with threat modeling and secure design
Experience with vulnerability management and application security tooling
Experience working in cloud-native environments such as AWS and GCP
Experience integrating security into CI/CD pipelines and developer workflows
Ability to write code in Python, Go, or similar languages for automation and tooling
Strong ability to work cross-functionally with engineering teams
Experience scaling security in a high-growth or late-stage startup (bonus)
Familiarity with AI-driven security workflows or automation (bonus)
Background in API security, data protection, or multi-tenant systems (bonus)
Experience with bug bounty programs and penetration testing (bonus)
Security certifications such as CISSP (bonus)

Benefits

Annual target bonus of 12%
401K plan with company match up to 3.5%
23 days paid time off per year, accruing
Seven paid holidays
20 additional flex remote days annually
5 Company Wide Office-Optional weeks tied to major holidays
1 Service Day Annually
Paid Parental Bonding Leave
Health, Vision, Dental Coverage
Life and Disability Insurance Covered 100% by NinjaTrader

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